Feature: 1. Wireless Visual Intercom Doorbell: Our 4.3inch IPS screen 2.4 wireless visual intercom doorbell provides a clear and wide view, allowing you to see who's at the door without opening it. It's a smart doorbell that offers high-definition video monitoring for your home. 2. Long Battery Life: Equipped with an 800mAh polymer battery, the doorbell can last up to 2 months with 10 daily presses after a full charge. Please note that the further the distance, the more power it consumes. 3. Night Vision & Wide Viewing Angle: With 4 advanced 850nm infrared night vision lights, the doorbell intelligently optimizes night vision mode, allowing you to see clearly even in pitch darkness. It offers a viewing angle of 70 degrees, providing a comprehensive view of your doorstep. 4. Large Storage & Two way Intercom: The doorbell supports up to 256GB SD card, allowing you to store a large amount of video footage. The 2.4G transmission allows for internet free interconnection and supports two way video intercom, providing a convenient and secure way for you to communicate with visitors. 5. Easy Installation & Low Power Consumption: The doorbell is wireless and easy to install. It features a built in speaker and microphone, and is powered by 2A/DC 5V. It offers ultra low power consumption and long standby time. Please note that the monitor needs to be connected to an external power source for long term use. The built in battery is only for temporary use and should not be used without an external power source for a long time. Specification: Display Screen: 4.3 inches Power Supply Information: DC5V/2A Audio Information: Built-in speaker, microphone Working Humidity: 10% -90% SD Card: Supports up to 256GB WIFI Mode: 2.4G Visual Angle: 70 degrees Night Vision Type: infrared night vision Working Temperature: -10 °~60 ° Video Processing Rate: 640x480 Image Sensor: GC0328 Working Humidity: 20% -80% RH SD Card: Supports up to 256GB Night Vision Type: Infrared night vision Working Humidity: 10% -90% Open Space Distance: 50-60 meters is better, but in the case of obstacles, it is about 20 meters (specific to the material of the obstacle) Battery Capacity: 800mah. After being fully charged, press 10 times a day for up to 2 months (the farther the distance, the more severe the power consumption) . Package List: 1 x Wireless Doorbell1 x Display1 x Charging Cable1 x User Manual1 x Large Base Plate1 x Small Base Plate1 x Large Back Sticker1 x Small Back Sticker1 x Screw Set Note: 1. The monitor needs to be connected to an external power source for long-term use. 2. The built-in battery is only for temporary use. 3. Do not use without an external power source for a long time.